WO2017018893A1 - Method and device for determining the quality of motor-car fuel - Google Patents

Method and device for determining the quality of motor-car fuel Download PDF

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Publication number
WO2017018893A1
WO2017018893A1 PCT/PL2015/000120 PL2015000120W WO2017018893A1 WO 2017018893 A1 WO2017018893 A1 WO 2017018893A1 PL 2015000120 W PL2015000120 W PL 2015000120W WO 2017018893 A1 WO2017018893 A1 WO 2017018893A1
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Prior art keywords
fuel
remarkable
reservations
resonator
generator
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PCT/PL2015/000120
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French (fr)
Inventor
Helena TETERYCZ
Kamil WIŚNIEWSKI
Grzegorz KLUBIŃSKI
Patrycja SUCHORSKA-WOŹNIAK
Olga RAC
Marta FIEDOT
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Politechnika Wrocławska
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Priority to PCT/PL2015/000120 priority Critical patent/WO2017018893A1/en
Publication of WO2017018893A1 publication Critical patent/WO2017018893A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/026—Dielectric impedance spectroscopy
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/22—Measuring resistance of fluids

Definitions

  • the subject of the invention is a method and a device for determining the quality of motor-car fuel, used in particular in vehicle service stations as a diagnostic device for checking the composition of fuel samples taken from the tank.
  • Fuel contamination detector from the French patent description no FR2620534, makes it possible to measure the nature and extent of contamination in the fuel tank.
  • the detector is equipped with a sensor located at the bottom of the tank and the control device or the potentiostat of providing the potential difference between the two electrodes of the sensor and the panel for reading out momentary reaction, is located just outside the tank.
  • the device to verify the type of fuel in the tank of the car vehicle known from the European patent no EP 1134574 is equipped with a pressure sensor located in the measuring container filled by the section from the filler pipe.
  • the pressure sensor weighing the fuel is connected to the electronic control unit, which sends a warning to stop filling or to stop the engine if there is a significant deviation from the expected mass of fuel.
  • the device for the determination of viscosity and the device for engine fuel injection control is known from the Japanese patent description no JPH09119891.
  • the measurement of fuel level is carried out very accurately and continuously by a small device, which determines the viscosity.
  • the device for the determination of viscosity is equipped with the viscosity sensor, which has a piezoelectric element with electrode and is submerged in the liquid for measurement, and the oscillating circuit connected to the sensor electrode for the determination of viscosity, supplying sensor with alternating voltage determining the viscosity.
  • Change of fluid viscosity is determined on the basis of the change in resonance frequency of piezoelectric element.
  • Fuel injection control device is equipped with the device to detect changes in the viscosity of fuel from a change in the frequency of oscillation of the piezoelectric element submerged in fuel, temperature sensor to determine the temperature of fuel, and fuel control system.
  • the essence of the way according to the invention lies in the fact that the impedance calibration curve is determined using experimental methods, and then the complex impedance is measured as a function of the frequency of the element of resonator stimulated submerged in the fuel tested using an electric signal from the generator, and then from the measured impedance characteristics as a function of frequency, the field of circle on the complex plane of Nyquist is determined, characteristic for the composition of fuel mixture tested, on the basis of which fuel composition is determined.
  • the real and imaginary part of the impedance of piezoelectric resonator element is measured, and for the measured frequency characteristics, the height of the resonance peak is determined, the value of which is characteristic for a particular fuel or for the frequency characteristics measured, half-width of the resonance peak and its height is determined, and the value of the resonant peak height is divided by its half-width value and the resulting value is characteristic for the fuel examined.
  • the selected parameters of complex impedance are analysed by calculating the appropriate size of impedance (Z ', ⁇ "), admittance (Y ', ⁇ "), capacity (C ', C"), module (M M”) or their derivatives.
  • the composition of fuel is determined from the characteristics of the complex impedance module and phase angle calculated.
  • changes of the component of imaginary impedance are read out in the resonance area and the difference of value between the maximum and minimum is calculated, which is divided by the slope of curve in the resonance area.
  • the resonant peak is selected, preferably the first one, and the stimulation signal is swept around the resonance frequency of resonator vibrations.
  • the essence of the way according to the invention lies in the fact that it is equipped with the generator, preferably the signal synthetized digitally (DDS) connected to the resonator, which through a vector voltmeter and ammeter is connected to arithmetic system connected to micro-controller.
  • DDS signal synthetized digitally
  • the analogue-to-digital converter is switched on between arithmetic system and micro-controller.
  • a voltage amplifier at the input of vector voltmeter, two outputs of which are connected to the first inputs of two multipliers, and the second inputs of multipliers are connected to the generator preferably a quadrature one, and the outputs of both multipliers, are connected through integrating circuits to arithmetic system.
  • the vector ammeter is a current-voltage converter connected to vector voltmeter.
  • the advantage of the solution is the simplicity of system and the use of advanced techniques of the analysis of resonance system impedance response.
  • the device enables significant simplification, miniaturization and shortening the time of analysis as compared to expensive, instrumental methods of the analysis of the composition of fuel.
  • the device is portable, easy to use and can be used in authorized customer service stations. It enables a station attendant to explain potential causes of engine damage related to the use of fuel with incorrect operating parameters by the user. It also has an ecological aspect, because the fuel with incorrect combustion parameters burns in the engine giving off a large amount of substances polluting the environment.
  • fig. 1 shows the impedance characteristics as a frequency function on the complex plane of Nyquist plot of the resonator submerged in the fuel tested with a variable ratio of gasoline to diesel
  • Method of determining the quality of motor-car fuel is that with experimental methods the impedance calibration curve is determined, and then the real and imaginary component of impedance as a function of the .frequency of resonator 2 submerged in the fuel tested is measured. Resonator 2 is stimulated by electric signal from generator 1. Then, with the measured impedance characteristics as a function of frequency on the complex plane of Nyquist plot with Z ⁇ Z", the field of circle is determined fig. 1, characteristic for the composition of the fuel mixture tested, on the basis of which the composition of fuel is determined. The field of circle characteristic of gasoline decreases with the increasing content of heavy oil components in gasoline. The degree of the contamination of gasoline with undesirable petroleum components is determined on the basis of the value of circle field and the calibration curve for a particular type of fuel.
  • Method of determining the quality of motor-car fuel is like in the first example, except that for the frequency characteristics measured, the resonant peak height is determined fig. 2, the value of which is characteristic for a particular fuel.
  • the height of the resonance peak of the component of the actual impedance of Z ' for diesel increases with the increase in the content of light organic compounds present, among others, in gasoline. Knowing the value of the resonance peak height and the calibration curve for a particular type of fuel, the degree of contamination of this fuel with undesirable components is determined.
  • Method of determining the quality of motor-car fuel is like in the first example, except that for the measured frequency characteristics of the component of the actual impedance, the half-width of the resonance peak and its height is determined, and then the value of the resonance peak height is divided by its value of the half-width, and the resulting value is characteristic of the fuel tested.
  • the height of the resonance peak of the component of actual impedance of Z ' ' for diesel increases and the half- width of this peak decreases with the increase of the content of light organic compounds present, among others, in gasoline.
  • the height of the resonance peak is divided by its half-width value and from the calibration curve for a particular type of fuel, the degree of contamination of this fuel with undesirable components is determined.
  • Method of determining the quality of motor-car fuel is like in the first example, except that for the measured frequency characteristics, changes in the component of imaginary impedance in the resonance area are read out and the difference of values between the maximum and minimum is calculated, which is divided by the slope of the curve in the resonance area.
  • the difference of values between the maximum and minimum for the component of imaginary impedance Z" in the resonance area for gasoline decreases and the slope of the curve in the resonance area increases with the increase of the content of heavy organic compounds present, among others, in oil.
  • the difference of values between the maximum and minimum for the component of imaginary impedance "Z" in the resonance area is divided by the slope of the curve in the resonance area, and from the calibration curve for a particular type of fuel the degree of contamination of this fuel with undesirable components is determined.
  • a method for determining the quality of motor-car fuel is like in the first example except that for the resonator 2 stimulated by generator 1 the first resonance peak is selected, wherein the stimulation signal is swept around the resonance frequency of the vibrations of resonator 2.
  • the device for determining the quality of motor-car fuel is equipped with generator 1 connected to the resonator 2, which by vector voltmeter 3 and vector ammeter 4 is connected to the arithmetic system 5 connected to the micro-controller 12.
  • Generator 1 stimulates the vibrations of resonator 2 having contact with the fuel tested by sinuosidal electrical voltage or current signal.
  • the stimulation signal is swept around the resonance frequency of the vibrations of resonator 2.
  • the voltage signal measured is processed using a vector voltmeter 3, and the current signal is processed using a vector ammeter 4.
  • the combined values of currents and voltages obtained are calculated in the arithmetic system 5 into the value of impedance or admittance. The electric answer obtained is interpreted by micro-controller 12.
  • Example 7 Example 7
  • the device for determining the quality of motor-car fuel made as in the sixth example with the difference that the generator 1 is a quadrature one 6, between arithmetic system 5 and micro-controller 12 the analogue-to-digital converter 11 is switched on, also the vector ammeter 4 is a current voltage converter 8 connected to vector voltmeter 3.
  • the vector voltmeter 3 is equipped with a voltage amplifier 7 at the input, two outputs of which are connected to first inputs of two multipliers 9 and the second inputs of multipliers 9 are connected to the generator 1 , and the outputs of both multipliers 9 are connected by the integrating systems 10 to the arithmetic system 5.
  • a sinusoidal signal from the quadrature generator 6, swept as a function of frequency is applied to the resonator 2.
  • the voltage response of resonator 2 is strengthened by the voltage amplifier 7, while the current response of resonator is converted to a voltage signal in the current-voltage converter 8, and then strengthened by the voltage amplifier 7.
  • the signals so strengthened are applied to the amplifiers 8, which perform the multiplication operation of the voltage signal obtained from the resonator with the appropriate stimulation signal and the signal which is in the quadrature to the stimulation signal.
  • the signals obtained are integrated in the integrating systems 9 obtaining at their output signals corresponding to the imaginary value of "Z" respectively, and the actual value of "Z" of voltage and current, respectively.

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Abstract

Method of determining the quality of motor-car fuel in accordance with the invention is characterized by the fact that with experimental methods the impedance calibration curve is determined, after which the impedance as a function of the frequency of resonator element (2) submerged in the fuel tested and stimulated by electric signal from generator (1), then from the measured impedance characteristics as a function of frequency, the field of circle on the complex plane of Nyquist plot ('Z, Z") is determined characteristic for the composition of the fuel mixture tested on the basis of which the fuel composition is determined. The device is equipped with generator (1) connected to the resonator (2), which by vector voltmeter ammeter (3) and vector ammeter (4) is connected to arithmetic system (5) connected to micro-controller (12).

Description

Method and device for determining the quality of motor-car fuel
The subject of the invention is a method and a device for determining the quality of motor-car fuel, used in particular in vehicle service stations as a diagnostic device for checking the composition of fuel samples taken from the tank.
Fuel contamination detector from the French patent description no FR2620534, makes it possible to measure the nature and extent of contamination in the fuel tank. The detector is equipped with a sensor located at the bottom of the tank and the control device or the potentiostat of providing the potential difference between the two electrodes of the sensor and the panel for reading out momentary reaction, is located just outside the tank.
The device to verify the type of fuel in the tank of the car vehicle known from the European patent no EP 1134574, is equipped with a pressure sensor located in the measuring container filled by the section from the filler pipe. The pressure sensor weighing the fuel is connected to the electronic control unit, which sends a warning to stop filling or to stop the engine if there is a significant deviation from the expected mass of fuel.
The device for the determination of viscosity and the device for engine fuel injection control is known from the Japanese patent description no JPH09119891. The measurement of fuel level is carried out very accurately and continuously by a small device, which determines the viscosity. The device for the determination of viscosity is equipped with the viscosity sensor, which has a piezoelectric element with electrode and is submerged in the liquid for measurement, and the oscillating circuit connected to the sensor electrode for the determination of viscosity, supplying sensor with alternating voltage determining the viscosity. Change of fluid viscosity is determined on the basis of the change in resonance frequency of piezoelectric element. Fuel injection control device is equipped with the device to detect changes in the viscosity of fuel from a change in the frequency of oscillation of the piezoelectric element submerged in fuel, temperature sensor to determine the temperature of fuel, and fuel control system.
The essence of the way according to the invention lies in the fact that the impedance calibration curve is determined using experimental methods, and then the complex impedance is measured as a function of the frequency of the element of resonator stimulated submerged in the fuel tested using an electric signal from the generator, and then from the measured impedance characteristics as a function of frequency, the field of circle on the complex plane of Nyquist is determined, characteristic for the composition of fuel mixture tested, on the basis of which fuel composition is determined.
Preferably, the real and imaginary part of the impedance of piezoelectric resonator element is measured, and for the measured frequency characteristics, the height of the resonance peak is determined, the value of which is characteristic for a particular fuel or for the frequency characteristics measured, half-width of the resonance peak and its height is determined, and the value of the resonant peak height is divided by its half-width value and the resulting value is characteristic for the fuel examined.
Preferably, the selected parameters of complex impedance are analysed by calculating the appropriate size of impedance (Z ',Ζ"), admittance (Y ',Υ"), capacity (C ', C"), module (M M") or their derivatives.
Preferably, the composition of fuel is determined from the characteristics of the complex impedance module and phase angle calculated.
Preferably, for the frequency characteristics measured, changes of the component of imaginary impedance are read out in the resonance area and the difference of value between the maximum and minimum is calculated, which is divided by the slope of curve in the resonance area.
Preferably, for the resonator stimulated by generator, the resonant peak is selected, preferably the first one, and the stimulation signal is swept around the resonance frequency of resonator vibrations.
The essence of the way according to the invention lies in the fact that it is equipped with the generator, preferably the signal synthetized digitally (DDS) connected to the resonator, which through a vector voltmeter and ammeter is connected to arithmetic system connected to micro-controller.
Preferably, the analogue-to-digital converter is switched on between arithmetic system and micro-controller.
Preferably, there is a voltage amplifier at the input of vector voltmeter, two outputs of which are connected to the first inputs of two multipliers, and the second inputs of multipliers are connected to the generator preferably a quadrature one, and the outputs of both multipliers, are connected through integrating circuits to arithmetic system.
It is preferable when the vector ammeter is a current-voltage converter connected to vector voltmeter.
The advantage of the solution is the simplicity of system and the use of advanced techniques of the analysis of resonance system impedance response. The device enables significant simplification, miniaturization and shortening the time of analysis as compared to expensive, instrumental methods of the analysis of the composition of fuel. The device is portable, easy to use and can be used in authorized customer service stations. It enables a station attendant to explain potential causes of engine damage related to the use of fuel with incorrect operating parameters by the user. It also has an ecological aspect, because the fuel with incorrect combustion parameters burns in the engine giving off a large amount of substances polluting the environment.
The subject of the invention is explained in examples of work and can be seen in the figure in which fig. 1 shows the impedance characteristics as a frequency function on the complex plane of Nyquist plot of the resonator submerged in the fuel tested with a variable ratio of gasoline to diesel, fig 2-resonance characteristics of changes in real part and the theta angle of the impedance of resonator submerged in the fuel tested with a variable ratio of gasoline to diesel of changes in real part and theta angle of the impedance of resonator submerged in fuel tested, fig. 3-resonance characteristics of the changes of the imaginary component and module of the impedance of resonator submerged in the fuel tested with a variable ratio of gasoline to diesel , fig 4-a block diagram of the device to determine the quality of motor-car fuel, and Fig. 5-a device to determine the quality of motor-car fuel with analogue-to-digital converter. Example 1
Method of determining the quality of motor-car fuel is that with experimental methods the impedance calibration curve is determined, and then the real and imaginary component of impedance as a function of the .frequency of resonator 2 submerged in the fuel tested is measured. Resonator 2 is stimulated by electric signal from generator 1. Then, with the measured impedance characteristics as a function of frequency on the complex plane of Nyquist plot with Z\ Z", the field of circle is determined fig. 1, characteristic for the composition of the fuel mixture tested, on the basis of which the composition of fuel is determined. The field of circle characteristic of gasoline decreases with the increasing content of heavy oil components in gasoline. The degree of the contamination of gasoline with undesirable petroleum components is determined on the basis of the value of circle field and the calibration curve for a particular type of fuel.
Example 2
Method of determining the quality of motor-car fuel is like in the first example, except that for the frequency characteristics measured, the resonant peak height is determined fig. 2, the value of which is characteristic for a particular fuel. The height of the resonance peak of the component of the actual impedance of Z ' for diesel increases with the increase in the content of light organic compounds present, among others, in gasoline. Knowing the value of the resonance peak height and the calibration curve for a particular type of fuel, the degree of contamination of this fuel with undesirable components is determined.
Example 3
Method of determining the quality of motor-car fuel is like in the first example, except that for the measured frequency characteristics of the component of the actual impedance, the half-width of the resonance peak and its height is determined, and then the value of the resonance peak height is divided by its value of the half-width, and the resulting value is characteristic of the fuel tested. The height of the resonance peak of the component of actual impedance of Z ' ' for diesel increases and the half- width of this peak decreases with the increase of the content of light organic compounds present, among others, in gasoline. The height of the resonance peak is divided by its half-width value and from the calibration curve for a particular type of fuel, the degree of contamination of this fuel with undesirable components is determined.
Example 4
Method of determining the quality of motor-car fuel is like in the first example, except that for the measured frequency characteristics, changes in the component of imaginary impedance in the resonance area are read out and the difference of values between the maximum and minimum is calculated, which is divided by the slope of the curve in the resonance area. The difference of values between the maximum and minimum for the component of imaginary impedance Z" in the resonance area for gasoline decreases and the slope of the curve in the resonance area increases with the increase of the content of heavy organic compounds present, among others, in oil. The difference of values between the maximum and minimum for the component of imaginary impedance "Z" in the resonance area is divided by the slope of the curve in the resonance area, and from the calibration curve for a particular type of fuel the degree of contamination of this fuel with undesirable components is determined.
Example 5
A method for determining the quality of motor-car fuel is like in the first example except that for the resonator 2 stimulated by generator 1 the first resonance peak is selected, wherein the stimulation signal is swept around the resonance frequency of the vibrations of resonator 2.
Example 6
The device for determining the quality of motor-car fuel is equipped with generator 1 connected to the resonator 2, which by vector voltmeter 3 and vector ammeter 4 is connected to the arithmetic system 5 connected to the micro-controller 12. Generator 1 stimulates the vibrations of resonator 2 having contact with the fuel tested by sinuosidal electrical voltage or current signal. The stimulation signal is swept around the resonance frequency of the vibrations of resonator 2. The voltage signal measured is processed using a vector voltmeter 3, and the current signal is processed using a vector ammeter 4. The combined values of currents and voltages obtained are calculated in the arithmetic system 5 into the value of impedance or admittance. The electric answer obtained is interpreted by micro-controller 12. Example 7
The device for determining the quality of motor-car fuel made as in the sixth example with the difference that the generator 1 is a quadrature one 6, between arithmetic system 5 and micro-controller 12 the analogue-to-digital converter 11 is switched on, also the vector ammeter 4 is a current voltage converter 8 connected to vector voltmeter 3. In addition, the vector voltmeter 3 is equipped with a voltage amplifier 7 at the input, two outputs of which are connected to first inputs of two multipliers 9 and the second inputs of multipliers 9 are connected to the generator 1 , and the outputs of both multipliers 9 are connected by the integrating systems 10 to the arithmetic system 5.
A sinusoidal signal from the quadrature generator 6, swept as a function of frequency is applied to the resonator 2. The voltage response of resonator 2 is strengthened by the voltage amplifier 7, while the current response of resonator is converted to a voltage signal in the current-voltage converter 8, and then strengthened by the voltage amplifier 7. The signals so strengthened are applied to the amplifiers 8, which perform the multiplication operation of the voltage signal obtained from the resonator with the appropriate stimulation signal and the signal which is in the quadrature to the stimulation signal. The signals obtained are integrated in the integrating systems 9 obtaining at their output signals corresponding to the imaginary value of "Z" respectively, and the actual value of "Z" of voltage and current, respectively. From the signals obtained in this way the value of impedance module and the tangent of the angle of losses is determined in arithmetic system 5. Voltage signals corresponding to the value of- the impedance are processed into digital form using analogue-to-digit converter 11, and the resulting digital signal is interpreted in the micro-controller 12.

Claims

1 Patent claims
1. Method of determining the quality of motor-car fuel, remarkable in that with experimental methods the impedance calibration curve is determined, and then the impedance is measured as a function of the frequency of the element of resonator (2) submerged in the fuel tested and stimulated by electric signal from the generator (1), then from the impedance characteristics measured as a function of the frequency the field of circle on the complex plane of Nyquist plot ('Z, Z") is determined, characteristic for the composition of the fuel mixture tested, on the basis of which the fuel composition is determined.
2. Method according to reservations 1, it is remarkable that the component of real and imaginary impedance of piezoelectric element of resonator (2) is measured
3. Method according to reservations 1, it is remarkable that for the measured characteristics of frequency the height of resonance peak is determined, the value of which is characteristic for a particular fuel.
4. Method according to reservations 3, it is remarkable that for the characteristics of frequency measured the half-width of the resonance peak and its height is determined, then the value of the resonance peak height is divided by its value of the half-width, and the resulting value is characteristic for the fuel tested
5. Method according to reservations 2, it is remarkable that for the characteristics of frequency measured, changes of the component of the imaginary impedance in the resonance area are read out and the difference of value between the maximum and minimum is calculated, which is divided by the slope of curve in the resonance area.
6. Method according to reservations 1, it remarkable that for the resonator (2) stimulated by generator (1) the resonance peak is selected, the first one preferably, and the stimulation signal is swept around the resonance frequency of the vibrations of resonator (2).
7. Device for determining the quality of motor-car fuel, remarkable in that generator (1) connected to the resonator (2) which, through vector voltmeter (3) 2 and the vector ammeter (4) is connected to an arithmetic system (5) connected to the micro-controller (12) .
8. Device according to the reservations. 5, remarkable in that generator (1) is a quadrature generator (6).
9. Device according to the reservations. 7, remarkable in that between an arithmetic system (5) and the micro-controller (12) the analogue-to-digital converter is switched on (11).
10. The device according to the reservations 7 and 8, remarkable in that vector voltmeter (3) is equipped with a voltage amplifier (7) at the input, the output of which connected to the first inputs of two amplifiers (9), and the second inputs of amplifiers (9) are connected to the generator (1) preferably a quadrature one (6), while the outputs of both multipliers (9), are connected by the integrating systems (10) to arithmetic system (5).
11. The device according to the reservations 5 and 8, it is remarkable that the vector ammeter (4) is a current-voltage converter (8) connected to vector voltometer (3).
PCT/PL2015/000120 2015-07-24 2015-07-24 Method and device for determining the quality of motor-car fuel WO2017018893A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021509711A (en) * 2017-12-28 2021-04-01 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト A method of determining the quality characteristics of a hydraulic fluid in an automotive hydraulic fluid container and a hydraulic fluid container that implements the method.
WO2023210553A1 (en) * 2022-04-27 2023-11-02 株式会社サンエー Composition identification program, composition identification device, and composition identification system

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FR2620534A1 (en) 1987-09-15 1989-03-17 Rosales Blanca Fuel contamination detector
US6208153B1 (en) * 1999-08-11 2001-03-27 Transat Corporation System for fast piezoelectric-resonator parameter measurements
EP1134574A2 (en) 2000-03-14 2001-09-19 Bayerische Motoren Werke Aktiengesellschaft Device for verifying the fuel-type contained in the tank of a motor vehicle

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Publication number Priority date Publication date Assignee Title
FR2620534A1 (en) 1987-09-15 1989-03-17 Rosales Blanca Fuel contamination detector
US6208153B1 (en) * 1999-08-11 2001-03-27 Transat Corporation System for fast piezoelectric-resonator parameter measurements
EP1134574A2 (en) 2000-03-14 2001-09-19 Bayerische Motoren Werke Aktiengesellschaft Device for verifying the fuel-type contained in the tank of a motor vehicle

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021509711A (en) * 2017-12-28 2021-04-01 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト A method of determining the quality characteristics of a hydraulic fluid in an automotive hydraulic fluid container and a hydraulic fluid container that implements the method.
JP7069321B2 (en) 2017-12-28 2022-05-17 カウテックス テクストロン ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト A method for determining the quality characteristics of the hydraulic fluid in a hydraulic fluid container for an automobile and a hydraulic fluid container for carrying out the method.
WO2023210553A1 (en) * 2022-04-27 2023-11-02 株式会社サンエー Composition identification program, composition identification device, and composition identification system

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